<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>注册页面</title>
</head>
<body>
<div>
  <h1>注册页面</h1>
  <input type="text" v-model="user.username" placeholder="请输入用户名">
  <input type="password" v-model="user.password" placeholder="请输入用密码">
  <input type="text" v-model="user.nick" placeholder="请输入昵称">
  <input type="button" value="注册" @click="reg()">
</div>

<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<script>
  let v = new Vue({
    el:"body>div",
    data:{
        user:{username:"",password:"",nick:""}
    },
    methods:{
      reg(){
        axios.post("/reg",v.user).then(function (response) {
          if(response.data==1){
            alert("注册成功")
            location.href="/";/*返回首页*/
          }else {
              alert("用户名已存在")
          }
        })
      }
    }
  })
</script>

</body>
</html>